Physics-Light

posted by .

Hey everyone, I am re-taking this exam, but have lost my book and can't get my PDF form of it to work. So I am hoping you can help me with the correct answers.
Thank you!
-Susan




2. Which of the following values represents an index of refraction of an actual material?
A. 0
B. 1 / 4<my answer>
C. 1 / 2
D. 5 / 4


4. If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is
A. 8 lux.
B. 24 lux.
C. 216 lux.<my answer>
D. 648 lux.




8. The unit for measuring the rate at which light energy is radiated from a source is the
A. Angstrom.<my answer>
B. lux.
C. lumen.
D. candela.

9. Compared to yellow light, orange light has
A. the same frequency.
B. a faster wave velocity.
C. a longer wavelength.
D. a different polarization.<my answer>




13. A virtual image produced by a lens is always
A. larger than the object.
B. smaller than the object.
C. located in front of the lens.
D. located in the back of the lens.<my answer>

14. In which of the following materials is the velocity of light greatest?
A. Air
B. Water
C. Crown glass
D. Fused quartz<my answer>



16. When a simple magnifying glass is used properly, the image will be formed
A. just inside the focal length of the lens.<my answer>
B. about 250 millimeters in front of the lens.
C. at the focal point of the lens.
D. about 500 millimeters behind the lens.

17. When the image of a distant object is brought into focus in front of a person's retina, the defect is called
A. nearsightedness.
B. farsightedness.<my answer>
C. chromatic aberration.
D. spherical aberration.

18. Reflecting telescopes are popular because they're
A. more powerful than a refracting telescope.<my answer>
B. smaller than a refracting telescope.
C. easier to build than a refracting telescope.
D. more durable than a refracting telescope.



20. Which of the following occurs when light is reflected from a rough or unpolished surface?
A. The original pattern of the light is distorted.
B. The original pattern of the light is preserved.<my answer>
C. The angle of reflection is less than the angle of incidence.
D. The angle of reflection is greater than the angle of incidence.

21. An object is located 51 millimeters from a diverging lens. The object has a height of 13 millimeters and the image height is 3.5 millimeters. How far in front of the lens is the image located?
A. 1.12 millimeters
B. 13.7 millimeters
C. 51 millimeters<my answer>
D. 189 millimeters



23. When a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is
A. less than the angle of reflection.<my answer>
B. less than the angle of refraction.
C. greater than the angle of reflection.
D. greater than the angle of refraction.


25. If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens, what is the height of the image?
A. 6 millimeters
B. 8 millimeters
C. 14 millimeters
D. 22 millimeters<my answer>

  • Physics-Light -

    You should have done better picking answers at random. All of your 13 choices are wrong. Did you get the other 12 right?

    You need to spend some time reviewing the subject, otherwise you do not deserve to pass the assignment. Try answering them again and explain the reasons behind your answers, and I will be glad to critique your reasoning.

  • Physics-Light -

    if an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens, what is the height of the image?

  • Physics-Light -

    DcdOn2 hello everybody!

  • Physics-Light -

    81c798ecb5

  • Physics-Light -

    26c0f2c32e

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Electrons are ejected from a surface with speeds ranging up to 6.0 x 10^5 m/s when light with a wavelength of 400 nm shines on it. a.) What is the work function of this surface?
  2. Religion Exam

    I am trying to find online materials such as old exams that I can use to prepare for my religion exam. I am looking for ones that are non-PDF, as my computer can't open PDF files.
  3. algebra 2

    i need answers to the pennfoster book matrices and determinants exam number :00703500. please make sure all the answers are correct. please and THANK YOU (:
  4. NYS ELA Online Practice Exam - PLEASE read!

    Today is my NYS ELA Exam Book 1: Multiple Choice Questions. I know I'm supposed to be at school but the 7th graders take the exam around 12:30 or 12:40. Right now the 8th graders are (still) taking the exam so I'm still at home. Tomorrow …
  5. Math

    susan spends 2 1/4 hours taking inventory and 1 1/2 hours restocking how many hours does susan work
  6. statistics

    Can someone work this out for me, so I can use as an example to do the other ones. Does it pay to study for an exam?
  7. Global History

    I need answers for "GLOBAL HISTORY REGENTS REVIEW" packet. Associated names are Mr. Moeller and Mrs. Sita. I can't find answers anywhere. The packet can be found blank online here: johnbowne DOT org/ourpages/auto/2011/1/31/49875088/Global_Regents_Review_Pack__blank_ …
  8. engineering

    Hey everyone! I have an exam on Monday and I want to know what I should do for this. Explain the sources and implications of size effect in strength of materials. Thank you sooo much ! :)
  9. Reading

    Hey Susan is taking an exam tomorrow as she begins her studies she quickly review the materials looking for keywords this is an example of
  10. statistics

    The professor teaching a large introductory class gives a final exam that has alternate forms, A, B, and C. A student taking the exam using Form B is upset because she claims that Form B is much harder than Forms A and C. Discuss how …

More Similar Questions